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Bio-inorganic hybrid photoanodes of photosystem II and ferricyanide-intercalated layered double hydroxide for visible-light-driven water oxidation
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| Title: | Bio-inorganic hybrid photoanodes of photosystem II and ferricyanide-intercalated layered double hydroxide for visible-light-driven water oxidation |
| Authors: | Kato, Masaru Browse this author →KAKEN DB | | Sato, Hisako Browse this author | | Yagi, Ichizo Browse this author →KAKEN DB | | Sugiura, Miwa Browse this author |
| Keywords: | Photosystem II | | Layered double hydroxide | | Oxygen evolution reaction | | Artificial photosynthesis | | Photoanode |
| Issue Date: | 20-Feb-2018 |
| Publisher: | Elsevier |
| Journal Title: | Electrochimica acta |
| Volume: | 264 |
| Start Page: | 386 |
| End Page: | 392 |
| Publisher DOI: | 10.1016/j.electacta.2018.01.133 |
| Abstract: | Photosynthesis converts solar energy into chemical energy. Photosystem II (PSII) oxidizes water to produce oxygen, electrons and protons under solar light irradiation. This light-driven water oxidation initiates a series of reactions in photosynthesis. Basic photoelectrochemical studies on PSII are directed toward the enzymatic applications of PSII for sustainable production of electricity or solar fuels. To maximize the photoelectrochemical catalytic activity of PSII on electrode substrates, interfacial designs between PSII and electrode substrates are important. Herein, we report bio-inorganic photoanodes of PSII and ferricyanide-intercalated layered double hydroxide (LDH) for visible-light-driven water oxidation. PSII is simply drop-cast onto a ferricyanide-intercalated cobalt-aluminum LDH and then shows a turnover frequency of 0.5 +/- 0.1 s(-1) and a turnover number of 920 +/- 40 for 1 h at pH 6.5 at thorn0.5 V vs. NHE under visible light irradiation. Photoelectrochemical experiments using a PSII inhibitor or a bio-engineered PSII suggest that interfacial electron transfer from the plastoquinone QA site of PSII to ferricyanide may play an important role in improving the photo-electrocatalytic activity and stability of PSII. Our studies will open up new possibilities in fundamental or advanced photoelectrochemical studies of PSII. (c) 2018 Elsevier Ltd. All rights reserved. |
| Rights: | © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/76660 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 加藤 優
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